Should I have to clean up after my Brother, his wife and child too?

I recently went into Foreclosure with my home due to my husband quiting his job and me trying to support our family for 6 months. I had a great job but I was pregnant going on leave. We moved back home out of state, in with my Mother, Brother, his wife and daughter. This is temporary until we get enough money together to get our life back on path. My husband found a good job and now I am staying at home with my two year old and newborn of 3 weeks. I had a c-section with this pregnancy. I am starting to get the clue that my sister-in-law thinks that it is my responsibility to clean up the kitchen after they make dinner. We have a schedule of every other night for each family to make dinner and clean up, or that was the agreement when we moved in. Recently, they seem to rinse everything off and leave it on the counter for me to empty the dishwasher and reload. They have not unloaded or loaded the dishwasher in..... I can't remember since my sister-in-law decided to go back to work a two months ago? Yes I am complaining but she constantly has a bad attitude all the time and comes home with a scowl on her face if one dish is out or something of the kids is out on the floor. I feel like I am in boot camp. She is so much younger than I am she is 23 and I am 30. I can't say anything to her or she blows off the handle. My husband can't even stand living with her. He is so sick of her bad attitude. We do pay rent to my mother. This is a rental home in both of their names. I am going crazy with the c-section, adjusting newborn to environment and taking care of 2 year old. When I have downtime during the day I take advantage of sleep because I am up through the night with baby. I took my brother and his family in at one point and not once, not once did I ever treat them the way they are treating us. I am very frustrated. We move into our new home in 2 months. What would you do?